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Ok first of all I will be using my Sansa Clip as my source as I feel an iem should always be tested with portable sources. I paid $200AUD for them brand new, which is dirt-cheap by Australian standards. I do not believe in burn in, especially for armature drivers - owning and listening to many iems has shown me burn-in is just a mental phenomenon where the brain adjusts to a new sound...” --ProjectDenz

“I wonder why UERM is often disregarded when picking from $1000 range. I'm guessing that it's due to "only" having 3 drivers, versus having 8 drivers per side. I can say with confidence that driver number does not equal sound quality(for the most part). Another reason I see why UERM might not be picked is its sound sig. It's perfectly flat. Personally, I love this. Reference sound with...” --kimvictor

“I'm giving these a 4 based on sound quality alone. I'm a cheap headphone user; I've gone from cheap headphone to cheap headphone over the past decade or so. I started with the Skullcandy Ink'd headphones, moved onto the Sennheiser CX400s, then the Meelectronics M6 and M9, and finally, this. I've also tried the Klipsch S4's. I'm currently on my third pair of these because well, they're so damn...” --az060693

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This is my very first pair of custom IEMs after trying almost all of the high end universal IEMs -- SE530, UE Super Fi 10, Etymotics etc. The sound of these UE11 Pros is superior in every way to all of the universal ones I had, but even more important they stay in my ear and provide a proper seal. Since my ear canals get very narrow, I found it very difficult to get any of my universals to...” --alyanm

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I had owned the UE-10's before this for about 3 years. So upgrading to these was a huge improvement in my opinion. Very nice full sound, with improved frequency response from 20 Hz to 18,000 Hz. Bass is much more present on these but not too overly stated. Gorgeous build quality. Very happy with these In ear monitors, I also own the JH-16's and still love listening to these all the time on...” --Richard Devine

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To start, I purchased these for two reasons. I am a live audio engineer, so I use these for mixing monitors and as my personal monitors when I sing Tenor as part of my group.
These have two speakers per ear. Low/Mid and High. 119db @1mw with an impendance of 21 ohms which means your iphone can drive these quite poorly.
My initial View:
I have been...” --hagosrush

“This is sort of a mini review.
Overall the sound and build quality are pretty okay. I like the smooth and balanced sound signature these in-ears have. The soundstage isn't too wide or high but it's acceptable. There is sibilance on high notes but with lower volumes it's okay. Bass is not overly powerful but still leaves impact and the mids and trebles are smooth and clear.
I...” --Slashfury99

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i was excited over my first custom IEM's ever, I was also excited because i've been a sucker for the Ultimate Ears sound for a long time. Now I know that Logitech is now in charge of UE, but I still felt like these would be very musical CIEM's, as the Ultimate Ears commercial line is so well known for their musicality factor. After a month of waiting due to having to get impressions, and then...” --IEMagnet01

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I bought these as a toss-up between the ER4P and themselves, and truthfully the ER4P are a lot better. these are a dual driver IEM that require a good seal to produce bass, and with the stock tips this can be hard, however, Sony's tips also work and are much easier and more comfortable.
To put them on you twist them into your ear and bend the wire around the top and then behind...” --BBBS

“EarTech Music -- Have you ever heard of them or Ear Technology Corporation? Well, me neither. This review is for EarTech Music Dual driver custom in-ear monitor. I ran upon this company one day while I was actually doing a search for "Ear Werks," and I must have typed something wrong with my fat little fingers. Somehow or fate, EarTech Music came up. So, being into music and audio, I clicked...” --acain